Factorial numbers: n! = 1*2*3*4*...*n (order of symmetric group S_n, number of permutations of n letters).
1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800, 39916800, 479001600
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
19 seqfan posts
Tue Dec 6 04:12:00 CET 2011 [seqfan] Re: Use of Easy keyword
Tue Dec 6 04:03:29 CET 2011 [seqfan] Re: Use of Easy keyword
Tue Dec 6 01:53:28 CET 2011 [seqfan] Re: Use of Easy keyword
Sat Oct 1 10:25:43 CEST 2011 [seqfan] Re: more help needed in entering sequences
Sat Jan 8 20:58:17 CET 2011 [seqfan] Re: conjectured list of divisibility sequences
Fri Oct 29 05:35:16 CEST 2010 [seqfan] Implementing first 500 sequences in Java
Fri Mar 26 23:29:32 CET 2010 [seqfan] Re: Sequences for Orderings
Mon Feb 22 22:24:46 CET 2010 [seqfan] Re: A173279 and A173280
Mon Feb 22 22:02:17 CET 2010 [seqfan] Re: A173279 and A173280
Mon Feb 22 21:12:18 CET 2010 [seqfan] Re: A173279 and A173280
Mon Feb 22 19:58:59 CET 2010 [seqfan] Re: A173279 and A173280
Mon Feb 22 17:00:13 CET 2010 [seqfan] Re: A173279 and A173280
Mon Feb 22 16:58:07 CET 2010 [seqfan] Re: A173279 and A173280
Mon Feb 22 15:43:45 CET 2010 [seqfan] Re: A173279 and A173280
Mon Dec 14 08:28:00 CET 2009 [seqfan] Re: OEIS wiki user update
Sun Dec 13 10:37:54 CET 2009 [seqfan] Re: OEIS wiki user update
Thu Dec 3 10:50:26 CET 2009 [seqfan] Re: Shouldn't add links to recurrence relations without proof
Wed Dec 2 02:04:12 CET 2009 [seqfan] Shouldn't add links to recurrence relations without proof
Tue Aug 4 15:01:02 CEST 2009 [seqfan] Re: offset of A000254 wrong?
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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